Sound and Light Review

James was experimenting with a flashlight and a mirror. He shined the flashlight on the mirror and it caused a spotlight on the wall behind him. Which of the following explains what happened?

• The mirror had a magnetic field that attracted light.

• The mirror refracted the light from the flashlight.

• The mirror reflected the light from the flashlight.

• The mirror absorbed all of the light.

Glass, water, and clear plastic allows the majority of light to pass through them. Which word best describes these objects?

• translucent

• refractive

• transparent

• opaque

Mrs. Blue’s class was conducting an experiment with a pencil and a glass of water. The students noticed that the pencil looked broken when they placed it in a glass of water. What explains why the pencil looked broken in the glass of water?

• The light bent when it passed from one medium to another. This is referred to as refraction.

• The light bent when it passed from one medium to another. This is referred to as reflection.

• The light waves were opaque when they moved from one medium to another.

• The light waves were able to become translucent when they reflected.

A card with writing on it is viewed through a jar with water in the jar. Part of the writing on the card appears to be changed. The change in the appearance of the writing is the result of which of the following?

• Light rays are absorbed by the glass of the jar.

• Light rays passing through the water are bent.

• Not all of the light that strikes the writing is reflected.

• Light is not able to bounce off the jar.

Students in Mr. Black's class used flashlights on different materials and recorded their results. Which material demonstrated a reflection of light?

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A musician plucks two strings on a guitar. The pitch of the first string is much lower than the pitch of the second string. What does this tell you?

• The first string is vibrating faster than the second.

• The second string is vibrating slower than the first.

• The two strings are vibrating at the same rate.

• The first string is vibrating slower than the second.

Mrs. Sipling has a bell to get her 2nd grade students quiet. She rings her bell and student know to close their mouths and get quiet. The bell makes a sound because ___________________.

• it is made of metal

• it is very heavy.

• it is a solid and not a gas.

• it vibrates.

Students in Mr. Gores' class need to construct a device that sends a signal using both light and sound. They have a selection of items they can use to build the device. Which two items will be BEST to use for making this signaling device?

• a cotton ball and a candle

• a piece of paper and a radio

• a large bell and a flashlight

• a paper towel and a toothpick

The police car below uses what to communicate and warn people as they move to an emergency? S4P2b

• gasoline and tires

• lights and a windshield

• sound and windshield wipers

• light and sound

Which object is transparent?

• window

• paper

• globe

• aluminum foil